Despite the many extinct animal species for which man has been responsible; Man -despite his very finest efforts- has yet to kill off a SINGLE insect species.
I use those "stand-well-back" 20-foot "jet of death" sprays which Terry mentioned.
Spray. Then be ready to run if necessary... (hence NEVER do this from a precarious position, eg halfway up a ladder) then let the wasps pick up the poison as they continue to enter and leave over the next hour.
The nest will be destroyed, your neighbours will be freed from their oppressive vespan overlords, and you will be hailed as a hero, paraded through the streets by ecstatic, cheering crowds. Young maidens will be pushed towards you by their grateful fathers, each eagerly grateful for you, and only too delighted for you to indulge yourself in whatever acts you wish, since nothing.... NOTHING is more than your due, you.. the conquering and avenging hero of the glorious masses.
Keith